AUTHOR GUIDELINES
V. Yu. Klevets Uzhgorod National University Ukraine
N. D. Savchenko Uzhgorod National University Ukraine
T. N. Shchurova Uzhgorod National University Ukraine
A. G. Slivka Uzhgorod National University Ukraine
K. O. Popovic NanoTecCenter Weiz Forschungsgesellschaft mbH Austria